Vat dyes of the anthraquinone series.



m, STA1 E$ WILHEL'M Hnnznnne AND WALTER VIBRUCK, on sciiomsnnna; Nana antam. sen -I" MANY, nssieivons T ACTIEN G-ESELLSCHAFT 'i'im Enema, GERMANY.

No Drawing.

dresses "being Landshuterstrasse. 24 and Neue Cul'mstrasse '5, respectively, Scheneberg, near Berlin, Germany, have invented certain new and usefulflmprove'ments in Vat Dyes of the .Anthraquinone Series, of which "the 'following is a specification."

Our invention relates to the manufacture of new. vat dyes of the anthraquinone. series derived from a so-called anthraquinoneacridone and possessing an acidylami'no .group in the benz'ene nucleus. These new dyes produce on cotton fron'l'a vat containing a hydi'osulfite and'an'alkali, generally speaking, violet tints, which on subsequent.

treatment with a hot soap solution change to blue tints of an excellent fastness. These new dyes may be manufactured by nitrating an anthraquinone-acridone, reducing the 'nitro compound thus obtained, and -finally substituting in the amino group the residue" of an organic-acid for. a hydrogen atom- Another Wa consists in acting with an 311-: th-raquinone 1alogen-acrid0ne upon the am id' of an organic acid.

The'followingexamples, the parts being by weight, illustrate the invention, without,

however, limiting it:

Example 1: To the solution of 418 parts of aiithraquinonaacridone (U. S. Patent No.

961,0 1? in 2 10 partsofleoncentrated sulfuric acid a mixture of 15 parts of nitric acid 63% and 30 parts. of cOnce'ntratedsul' furic acid is slowly added at a temperature of 05F C. The .mass. is poured on icewater, whereupon the anthraquinonenltroacridone separates, in orange-yellow flakes,

which melt above 300 C. Thenitro compound is filtered off, washed -.with water,

then 'in' aqueous suspension while. stirring aft-er addition of a solution of parts'crystallized sodium sulfid heated at 90 to 1OQ (1, Thus the blue-colored aminoacrldone is formed. It'is' nearly insoluble in the 'usual solvents, but it dissolves a little in nit-robenzene and also inanilin'withablue color;

it melts above 300 0,. From its violet vat cotton is dyed feeble 'greenish-gray,.changing to deep brown by treating with chlorid of lime. 34 parts of the anthraquinone- Specification of Letters Patent. I Application mea .ful 26,

VAT nYEson "THE mu mies snnmsn anrinoacridone and 3510 parts of nitrobn zene are boiled; By slowlyaddin .14 of b'enzoyl-c'hlorid the blue color 0' theKdia FABRIKATmN, on

solved amino'compoundimmediately turns to reddish-violet and the anthraguin'ones benzoyl-amino-acridone separates m clays-- ,talline shape, It is insoluble in the usual solvents, in nitrobenzene it'dissolves 1on1 sparely." The solution in concentrated'sl f-uri'c; acid is yellowish-red; With hydro-.

"sulfiteand an alkali a violet vatis formed,

from which cotton -is ,dyed violet tints, which on subsequent treatment with a hot soapso lution-change. to blue.

Example 2: 40 parts of anthraquinonebrom-acridone, 12 parts of benzamid, lpa'rtof copper powder, 6 parts of calcined sodium carbonate and 100' parts of nitrobenzene are boiled in a refiux apparatus for 24 hours,

whereby the'solution changes its coloration from red to violet. The product formed during the reaction separates in a dark vioe let :crystalline shape. After cooling the anthraquinone-benzoylamino-acridone is filtered and washed with benzene and then with hot water. It is-identical with that, obtained by the process, indicated in the foregoing example.

For acidylizing the amino group of the 'anthraquinone-amino-acridoneother 'acidylizing agents, such-as acetic anhydrid, formic acid, ace'tyl-ehlorid, toluyl-chlorid, chlorbenzoylbromid, phthalic anhydridmay 'be used, whereas the benzamid' employed in the Example 2 may be replaced by one of its substitution derivatives, or by an 'amid of other organic acids, such as'a'cet-ie, oxalic, 'phthalic acids. Instead of an'anthra'quinone-brom -a-eridone a chlor-acridone may serve as parent material.

Having now described our invention and in what manner it maybe performed what we claim is,-

1. As new articles of manufacture the herein-described new vat dyes of the anthraquinone series being anthraquinone-acidylamino-acridones:

cnn zg oan4 zg csmnnacn x i which are insoluble in the usual solvents, very spa'rely' soluble in nitrobenzene, but soluble in concentrated sulfuric acid to a yellowish-red solution and soluble in alkaline hydr'osulfite yielding violet vats which dye cotton, generally speaking, violetshades,

which change to blue on subsequent treatment with a hot-soap solution.

ble in the usual solvents, very sparely soluble in nitrobenzene, but soluble in concentrated sulfuric acid to at yellowish-reel solution and soluble in alkaline hydrosulfite yielding a violet vat which dyescotton vi 0 let shades, which change toblue on subsequent treatment with a hot soap ,olution.

In testimony whereof We have hereunto set our hands in presence of two subscribing Witnesses.

'WILHELM HERZBERG.

WALTER BRUCK.

Witnesses WOLDEMAR HAUPT, HENRY HASPER. 

